Set shoe



Oct. 21, 1924. 1,512,066

W. H. TAYLOR SET SHOE Filed March 13, 1923 Patented Oct. 21, 1924.

WILLIAM H; TAYLOR, F BEAUMONT, TEXAS.

SET SHOE.

Application filed March 1a, 1923. Serial No. 624,795.

To all whom it may concern:

Be it known that I, WILLIAM H. TAYLOR,

a citizen of the United States, residing at Beaumont, in the county of Jefferson and I State of Texas, have invented certain new and useful Improvements in Set Shoes, of

which the following is a specification.

This invention is an appliance used in connection with oil-well drilling operations, and more particularly after the well has been drilled into the oil-bearing stratum, and it is desired to clean the screen at the bottom of the hole.,so as to allow the oil to properly enter the same.

The invention has for its object to provide a very efiicient and reliable appliance for the purpose stated, and also one which is easy to handle and simple in construction.

With the object stated in view, the invention consists of a set-shoe embodying a novel combination and arrangement of parts to be hereinafter described and claimed, and in order that the same may be better understood, reference is had to the accompanying drawing, wherein,-

Figure 1 is an elevation of the appliance; Figs. 2 and 3 are enlarged vertical sections of the set-shoe showing the same in different positions, and Fig. 4 is a sectional detail on the line 44 of Fig. 2.

Referring specifically to the drawing, 10 denotes a fragment of a well casing which is set in the hole, and which encloses a dis charge tube 11 extending to the top of the well. The hole is contracted below the bot tom of the casing to form an annular shoulder on Which seats the set-shoe 12 fitted to the bottom of the casing. To the lower end of the tube 11 is connected a strainer 13 which may be a perforated tube. The lower contracted end of the hole extends into the oil sand or other oil-bearing stratum or formation, and. the strainer 13 is located in this portion of the bore so that the oil may enter the strainer and be carried to the surface of the ground by the tube 11.

To the bottom of the strainer 13 is fitted the set shoe which is the subject matter of the present application for patent. This shoe is composed of a pair of slidably connected tubular sections '14 and 15 open at ter, in turn, is connected to the bottom of the strainer 13 by an ordinary coupling sleeve 17. The bottom section 15 is adapted to seat on the bottom of the contracted portion of the well hole or bore.

In the section 14, near the lower end thereof, is rigidly mounted a valve seat composed of a ring 18, the central opening 19 of which forms a port establishing communication between the sections 14 and 15. Above this valve seat, the section 14 also contains an ordinary back-pressure valve 20.

The upper portion of the section 15 extends into the section 14, and is here fitted with a valve 21 adapted to close the open ing 19. This valve has the shape of a cap, its top being tapered so as to fit in the port 19, and the top of the cap has side ports 22, through which and the port 19 communication is established between the sections 14 and 15 when the valve is not seating and closing the port 19.

The section 14 has a number of longitudinal side slots 23- into which loosely extend guide screws or pins 24 carried by the section 15, whereby the section 15 is prevented from rotating relative to the section 14, but is free to slide to the extent of the length of the slots. The screws or pins 24 also prevent endwise separation of the sections 14 and 15.

The section 15 is normally held stationary in lowered position relative to the section 14 by means of one or more readily frangible coupling pins 25 passing through said sec tions, and with the parts in this position, the appliance is ready to be lowered into the Well for operation. When the bottom of the well is reached, the appliance will be slightly raised so as to leave the lower section 15 of the set shoe clear of the bottom of the well. The outside of the strainer 13 can now be washed by means of water pumped to the bottom of the well by an ordinary wash pipe which is lowered down the tube 11 and through the strainer 13 until its lower end is within a few inches of the section 14. The circulating water pump is then started, whereupon the water is pumped through the sections 14 and 15 to escape from the bottom of the lower section and pass upwardly along the outside of the strainer. The valve their ends. To the top of the upper sec- 21 being unseated the water passes freely tion 14 1s connected a n1pple'16, whlch lat from the section 14 into the section 15 by the way of the ports 19 and 22. After the strainer has been thoroughly. washed, the appliance is lowered to the bottom of the hole and slightly jarred whereupon the impact of the section 15 with the bottom of the hole causes the pins to be sheared ofi', thereby uncoupling the sections 14 and 15 so that the weight of the section 14 and the parts above carrying the same causes said section to descend to bring the port 19 over the valvewhether or not the valve has closed after the operative screen is washed, because a valve of this kind is held to its seat by a spring. However, with the use of the present appliance the seating of the valve is made apparent'to the driller without fail because it is held against its seat by the weight of the strainer, and the parts above the same, and the entire weight is then carried by the point of contact between the valve 21 and its seat 18.

I claim:

1. The combination with a well-strainer and a discharge tube to which the same is connected; of a set-shoe connected to the bottom of the strainer, said shoe consisting of upper and lower sections connected for a relative sliding movement, frangible coupling means locking the sections against such movement, a valve in one of the sections, and a seat for the valve in the other section, said valve being open when the sections are locked, and closing by the relative sliding movement thereof.

2. The combination with a well-strainer and a discharge tube to which the same is connected; of a set-shoe connected to the bottom of the strainer, said shoe consisting of upper and lower sections connected for a relative sliding movement, frangible coupling means lOCklIlg the sections against such movement, and coacting means associated with the sections for preventinga flow of fluid therethrough, said means being in inposition when the sections are locked and being placed in operative position by the relative sliding movement thereof.

3. The combination with a well-strainer and a discharge tube to which the same is connected; of a set-shoe connected to the bottom of the strainer, said shoe consisting of upper and lower tubular sections open at their ends, and connected for a relative sliding movement, frangible coupling means locking the sections against such movement, and coacting means associated with the sec tions for preventing a flow of fluid therethrough, said means being ininoperative position when the sections are locked and being placed in operative position by the relative sliding movement thereof.

4. The combination with a well-strainer and a discharge tube to which the same is connected; of a set-shoe connected to the bot tom of the strainer, said shoe consisting of upper and lower tubular sections open at their ends, and connected for a relative sliding movement, frangible coupling means locking the sections against such movement, a valve in one of the sections, and a seat for the valve in the other section, said valve being open when the sections are looked, and closing by the relative sliding movement thereof.

5. The combination with a well-strainer and a discharge tube to which the same is connected; of a set-shoe connected to the bot tom of the strainer, said shoe consisting of upper and lower tubular sections open at their ends, and connected for a'relative sliding movement, frangible coupling means locking the sections against such movement,

a valve seat ring in the upper section, and

a valve in the lower section for said seat, sald valve belng 1n unseated posltlon when the sections are locked, and seating by the rclative sliding movement thereof.

6. The combination with a well-strainer and a discharge tube to which the same is connected; of a set-shoe connected to the bottom of the strainer, said shoe consisting of upper and lower sections connected for a relative sliding movement, and coacting means associated with the sections for preventing a flow of fluid therethrough, said means being normally in inoperative position. and being placed in operative position by the relative sliding movement of the sections.

7. The combination with a well-strainer and a discharge tube to which the same is connected: of a set-shoe connected to the bottom of the strainer and consisting of upper and lower sections connected for a relative sliding movement, frangible coupling means locking the sections against such movement, the lower section being adapted to seat on the bottom of the well hole to permit the upper section to slide downwardly relative to said seated section when the coupling means is broken, and coacting means associated with the sections-for preventing a flow therethrough, said means being normally in inoperative position, and being placed in operative position by the downward movement of the upper section.

8. The combination with a well-strainer and a discharge tube to which the same is connected; of a set-shoe connected to the bottom of the strainer and consisting of upper and lower sections connected for a relative sliding movement, frangible coupling means locking the sections against such movement, the lower section being adapted to seat. on the bottom of the well hole to permit the upper section to slide downwardly relative to said seated section when the coupling means is broken, a valve in one of the sections, and a seat for the valve in 1 the other section, said valve being open when the sections are locked, and closing when the upper section slides downwardly.

In testimony whereof I afiix my signature.

WILLIAM H. TAYLOR. 

